An optical system for variably re-directing light (preferably sunlight) which passes through an input aperture. The input aperture is covered with a flexible optical film such as a Fresnel lens having an optical deflection characteristic which varies as a function of position so as to redirect the l ...

An optical system for variably re-directing light (10, 80, 150, 190) (preferably sunlight) which passes through an input aperture. The input aperture (20) is covered with a flexible optical film (90, 200, 320) such as a Fresnellens having an optical deflection characteristic which varies as a functi ...